Mutation details: A construct was made that contained the endogenous polyadenylation sequence, intron 11, and ~2kb of of the 3' flanking region of the gene. The endogenous promoter was replaced with a promoter containing a 36-bp deletion in the 5'-untranslated region and 770-bp trophoblast regulatory element. This resulted in a construct that allowed expression in the placenta prenatally only, while the 36-bp deletion in the promoter allowed distinction of this transcript from that of native transcript. Enzymatic activity of the protein product was not detected in any of the tissues tested at postnatal day 17 in transgenic mice.
(J:73418)

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